Year	Percent change
1980	-37.576
1981	99.547
1982	8.2
1983	46.821
1984	18.178
1985	22.441
1986	9.327
1987	-9.345
1988	-3.394
1989	-9.783
1990	38.922
1991	22.005
1992	-6.308
1993	-13.253
1994	-50.45
1995	0
1996	-11.592
1997	21.023
1998	16.323
1999	1.353
2000	2.864
2001	119.789
2002	199.898
2003	-51.137
2004	8.906
2005	13.052
2006	49.283
2007	21.325
2008	18.536
2009	6.077
2010	15.524
2011	9.926
2012	2.485
2013	-6.365
2014	15.989
2015	-25.554
2016	-18.127
2017	8.19
2018	11.453
2019	-0.757
2020	7.151
2021	9.805
2022	14.324
2023	6.506
2024	3.089